US1684026A - Roof ventilator - Google Patents

Description

Sept. 11, 1928.

C. G. HAWLEY ROOF VENTILATOR Filed Dec. 1927 abtozmq Patented Sept. 11, 1928.

UNITED STATES PATENT OFFICE.

CHARLES GILBERT HAWLEY, OF CHICAGO, ILLINOIS, ASSIGNQR TO CENTRIFIX. COR- PORATION, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

ROOF VENTILATOR.

Application filed December This invention relates to improvements in roof ventilators .andchimney cowls, and the object of the invention is to provide a chimney or ventilator top wherein advantage shall be had or taken of wind pressure to increase the draft. To that end the invention comprises a tubular chimney or ventilator extension in combination with a whirl-promoting tuyere. of a barrel type containing many tangential tuyeres and secured upon the top.

of said extension, In association with the fixed tuyere is a swinging tuyere back or box of U-shape in horizontal section, and with that part is associated a member through which it is swingably held and by the action of which in the wind, the open end of the U-shaped tuyere box is always presented to the wind. The arrangement is such that a substantially uniform velocity pressure of air is maintained all the way around the tuyere. The air under pressure enters the tangential tuyeres'thereof and self-organizes a vortex within the tuyere. The latter is co-axial with said tubular chimney or ventilator extension, and being free to expand axially through the upper end of the barrel-like tuyere serves to greatly augment the draft or movement of air or gases through said extension.

The invention will readily be understood on reference to the accompanying drawings in which Fig. 1 is a side elevation of a ventilator or draft-inducing device embodying this invention; Fig. 2 is a front elevation thereof, one half in section upon the line 22 of Fig. 1; Fig. 3 is a plan View of the ventilator; Fig. 4 is a horizontal section on the line 44 of Fig. 1; and, Fig. 5 is a detail vertical section enlarged and better illustrating the varying and relative diameters of the aforesaid tubular extension and said tuyere.

In the drawing the tubular extension before mentioned is marked 1. It is intended to be placed at the top of a chimney, duct or other ventilating stack requiring a strong upward draft. Secured to the top of the part 1 is a broad ring 2, and some distance above it is a like broad ring 3; but the latter is characterized by a larger central hole 3. The

rings 2 and 3 are joined by a circumferential series of inclined tuyere blades 1, which as best shown in Fig. 4 form an equal-number of tuyeres 5 which enter the internal space 6 tangentially. Thus is completed at the top of the extension 1 a multiply tuyered generally cylindrical space 6 which is of larger 6, 1927. Serial No. 238,041.

drain tubes which lead off from the floor 6 of the chamber 6. The before mentioned tuyere box or guard is marked 8. Asv best shown in Fig. 4 it is U-shaped in horizontal cross section, and as well shown in Fig. 2it is provided with top and bottom flanges 8 which are turned inward and which lie below andnearly meet the respective bottoms of the rings 2 and 3. The purpose of this construction is to make substantially tight joints and prevent excessive loss of pressure air from the box. The box is of slightly larger diameter than the rings 2 and 3 and thus a pressure air space 9 is provided at the sides and back of the barrel-like tuyere. To be effective the box must swing so that its open end is always presented to the wind. To that end a spider 10 is provided on the top of the tuyere. That spider supports a vertical. post 11 having a cap-like nut 12 at its top. A bearing sleeve 13 is journaled on the post 11 to turn freely, and the sleeve 13 through the medium of a sufiiciently extended flange 13 bears a hood portion 14. The latter in turn supports the box or guard 8 through the medium of the depending bars 15 and 16. The hood 14 presents its low end above the open end of the box 8 and rises from that point, presenting its greatest area back of the pivot pin 11. The back of the hood is open so that the air and gases rising thereinto through the opening 8 may escape freely.

Preferably the hood is formed of a single piece of metal bent as shown and possessing in itself sufiicient strength (aided by the bracing shown) to withstand Wind velocities and maintain its shape against the same. Due to its shape the hood swings with the wind, and in this is assisted by a top vane 14. The'latter to counteract the whirling tendency of the gases emerging from the tuyere is inclined to the normal axis of the hood, see Fig. 3. The simple journal bearing shown is easily oiled. The end of the sleeve 13 rests upon the central part of the spider 10 and the weight of the hood is not great, so that there is little friction to prevent the easy swinging of the hood. Obviously the cap-like nut 12 protects the oiled bearing and also prevents the accidentallifting 0f the hood from the tuyere. The parts 10 and 11 may be regarded as one and the part 10 is fastened to the top of the tuyere.

Swinging always toward the wind, the windward side of the tuyere receives pressure air directly and by means of the distributing box 9 pressure air is also supplied to the remainder of the tuyeres 5. In consequence of the entry of the large number of thin flat- Having thus described my invention I claim as new and desire to secure by Letters Patent 1. The herein described draft inducing ventilator device comprising a tubular extension, in combination with a multiply tuyered barrel-like structure fixed upon the top thereof, containing a larger opening in its top and distinguished by top and bottom rings of greater diameter than itself, and a pressure air box enclosing one side of said tuyere and supported to swing its open end toward the wind.

2. The device as defined in clailnl characterized by a vertically pivoted wedge-shaped cowl member which supports said box and serves to swing the same.

In testimony whereof, I have hereunto set my hand this 3rd day of December, D. 4

CHARLES GILBERT HAWLEY.

Images